Stropping-machine.



I provided withfa suitableha-ndle B, and in' ALLISON A. mm, or

NEW YORK, 1v. YQASSIGNOR or ONE-HALF To HENRY J. HEMMENS, or NEW YORK, 1v. Y.

' srRoPrmG- ncnrnn Application filed October 16, 190s. Serial No. 457,983.

To all whom tt may concern." a

Be it knownthat I, ALLISON A. PRATT, a citizen of the United States, and a resident of the city .of'New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Stropping-Machine, of which the following is a full. clear, and exact description.

The object of the invention is to provide a new and improved stropping machine for stropping razor blades, knives and other cutting implements, the stropping machine being arranged to hold one side of the cutting edge of the blade in contact with a revolving stropping roller, for anydesired length of time, and on turning the stropping roller-Vin the reverse direction to automatically reverse the blade relative/to the roller, with a View to bring the other side of the cutting edge in contact with the stropping roller. I

The invention consists, of novel features" mgs forming a part of this specification, in

which similar characters of reference indicate corresponding parts in all-the views.

Figure; 1 1s a front velevatlon of the 1mprovement, parts being in section; Fig. 2'

is a like View of the same showing the parts in a dillerent position; Fig. 3 is aside elevation of the improvement; Fig. 4 is a cross section of the same, on the line .44: of Fig.

1; 5 is an enlarged cross section of the" friction reversing device, the section being on theline 55 of Fig. 1; and Fig. 61s a .plan view of the blade holder.

The frame A of thejstropping machine is the said frame is journaleda roller shaft C carrying a Jrollerv D having a peripheral face of-a suitable st-ropping material, such as leather-and the like. On one end of the roller shaft- C is secured a pinion E in mesh with a gear-Wheel -.F having its shaft F" journaled on the main frame A, and on the outer face fof the gear wheel F is secured a handle G yadapted to betaken holdofby the; operator, forturning the gear wheel F, with agview to rotate the pinion If], the shaft C and thestropping roller D, ln erfher'a I forwarder a backward direction, "according 1 the ,end of the shaft I.

to the direction in which the handle G is turned:

The blade H to be sharpened is removably heldin a rocking blade holder I, journaled on the frame A, and arran ed in such a Specification of Letters Ztatent, Patented Aug, 1910. I

manner that it is automatical y reversed on reversing the motion of the strapping roller D, with a view to bringeither side of the cutting edge of the blade H iii-contact with. the peripheral face of the stropping roller D, as will be readil -underst0od-byreference to F igs. 1', 2 an 4.

The rocking blade holder I consists essentially of .two plates I, I made of steel or other spring metal, and secured at its ends in'shafts I, I ofwhich'the shaft I has a reduced end 1 journaled in one side of the frame A, and carrying at its outer end a flat spring J adapted toengage stops J, J

held on the frame A, the flat spring J serving to automatically swing the cutting edge of the blade H out of contact with the peripheral face'of the stropping roller D at the time the latter is reversed, so that the cutting edge of the blade is not liable to cutinto the stropping rollerv D .at the time of reve'rsin the said roller. The shaft I which is alo mounted'to turnin the frame A, is provided with a reduced portion I, on which is mounted to rotate loosely agear wheel K in mesh with an intermediate gear wheel L journaled on a stud L held on' the frameA', andthe said intermediate gear Wheel L is in-mesh'w'ith a-gear-wheel X, se-' cured on the roller shaftC. A washer O is mounted on the reducedportion I", so as to slide forward and to'turn with the same, and-the said Washer O is pressed against the. outer face of the gear wheel K by a spring P coiledon the reduced portion 1 of. -tl1e"blade h lder -The outer end of. the

spring P. abuts against a nut Q screwing on the outer threadede'nd of the reduced 'POl", 'tion I, to. permit the operator to ad ustthe tension ofthe spring so that the washer O presses with more or less force-against the gear wheel K, to holdthe latter against .Now when' thc stropping rollerDis turned bythe operator turning the handle G, vitis evident that the Wheel; L, and the latter rotates the gear wheel K, so that aarocl ring motion is given gear wheel Nrotates the int e1-me liate, gear tates loosely on the reduced end I? of the I shift the roller D- axially forward and back-j ward on each revolution of the stropping shaft 1*. Now-when the motion of the stropping roller D is reversed, the blade holder I s rocked in a reverse direction, so that the blad e'I is'sWung over, tofbring the other side -'of its "cutting edge in contact with the peripheral face of the stropping roller D, and 'on. further. rotation of the stropping roller D, the pinion K rotates again loosely.

on .the reduced portion I of the blade holder I. 1 7

From the foregoing, it will be seen, that ;by, the operator "turning the handle G in one direction, the blade is reversed, to bring one SldG of its-cutting edge in proper relation with the stropping roller D, and to keep this 'sid'ezof the cutting edge in contact with the said" roller as long as the latter is turned in the same direction, but as soon as- -the "operator "reverses the motion of the "stropping roller D by turning the handle G in the opposite direction, then the posi jtion of the blade H is reversed relative to the stroppingroller D, that is, the other "side of the cutting edge of the blade H is brought into contact with the peripheral '30- =face ofthe stropping roller D and is kept in contact with the stropping roller as long asthe latter is" rotated inthe reverse direction. It willbe noticed that by the friction device, consisting of the washer O and the spring P, the corresponding side of the cutting edg'eof the blade H is held with the desired force in contact with the peripheral face of the stropping roller D, to insure proper stropping of the cutting edge.

\Vhen the operator is in the act of-reversing the motion of the handle G, the spr ng J gives aninitial outward swinging motion to the blade holder I, so as to lift the. cut

ting edge oif the] peripheral face of the stropping roller D, as previously explained,-

it being understood that on moving the handle Gr in the reverse direction, the blade holder I is rocked to swing the blade H.

over into a reverse position, as above. explained. In order to bring different portions of the peripheral face of the stropping roller D n contact'with the cutting edge of the blade H, the said stropping roller D automatically reciprocated'in an axial direction, and for this purpose the endsof the roller D are provided with cam faces It, It, alternately engaging pins R R held on the frame A, so that when the roller D' is rotated, the

cams R, R by engaging the pins R ,,R?

rdlln; p

'It is understood that the gear wheel N is razor blade in made. sufficiently Wide to remain in mesl with the intermediate gear wheel L during the axial reciprocation 'of the'roller D. I

Although I have shown the devicearranged for stroppin thin razor blades, it is evldent other cutting tools, such as regu- -lar' razors, knives and the like, may be sharpened by the machine, it being .only necessary to" provide corresponding blade holders I for different shaped blades to be sharpened. 1 As shown in the drawings, the ends of the .plates 1, and 1 are ,s aced apart in'the shafts I 1*, and the said plates I, I are bent toward each other, so that when the razor blade H is forced between the plates I and P, the latter securely clamp the position, as indicated in Fig. 4. f

By the arrangement described, the razor blade H can be readily inserted or removed from the blade holder I.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. A stropping machine, comprising a stropping'roller, manually controlled means for rotating the stropping roller in either direction, a rocking blade holder for the razor blade to hold either side of the cutting edge of the razor blade in contact with the peripheral face of the said roller, and a train of gear wheels connecting the said stropping roller with the said rock shaft, one of the gear wheels in the said train. rotating byfriction with its shaft.

2. A stropping machine, comprising a stropping roller, manually controlled means for rotating the stropping roller in either direction, a rocking blade holder for. the

razor blade to hold either side of the cutting edge of the razor blade in contactwith the peripheral face of the said roller, a train of gear wheels connecting the said stropping roller with the said rock shaft, the gear wheel of the said train of gears which is mounted 'on the rock shaftbeing loose thereon, the rock shaft having a reduced endfor receiving the gear wheel, and a spring pressing the gear wheel against the shaft. 7

3. A stropping machine, comprising a stropping roller, means for rotating the same in either direction, a rocking blade holder for the razor blade, means controlled from the said stropping roller for reversing the blade holder on reversing the said stropping roller, and means for imparting an axial reciprocating movement to the said stropping roller on rotating the latter.

4. A stropping machine, comprising a strop j'i'ng roller adapted to be turned in either dircctionga blade holder for the razor blade, -a connection-between the said stropping' roller and the said blade holder for reversing the latter on reversing the motion of the stropping roller, andshifting means for longitudinally reciprocating the said stropping roller.

5. A stropping machine, comprising a stropping roller, means for rotating the same in either direction, a rocking blade holder for the razor blade, means controlled from the said stropping roller for reversing the blade holder on reversing the said stropping roller, and means imparting an initial movement to the said blade holder for moving the cutting edge of the razor blade out of contact with the stropping roller on reversing the latter.

6. A stropping machine, comprising a stropping roller, a blade holder for a razor blade, means for rotating the roller in either direction, and a connection between the roller rotating means and the blade holder for reversing the latter when the motion of the roller is reversed, and means acting on the holder to lift the blade out of contact with the roller, before the 'motion is reversed.

7. A stropping machine comprising a stropping roller adapted to turn in either direction, a blade holder for the razor blade,

the roller is rotated for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALLISON A. PRATT.

Witnesses:

Tnno. G. HOSTER, EVERARD B. MARSHALL. 

